Condensed Consolidated Statements of Operations - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue:
Total revenue		$ 0	$ 0	$ 0	$ 886
Operating expenses:
Research and development	[1]	44,744	24,660	112,308	55,822
General and administrative		10,648	8,584	35,005	25,874
Acquired in-process research and development		0	(298)	0	130,188
Gain on sale of in-process research and development asset		0	(14,609)	0	(14,609)
Total operating expenses		55,392	18,337	147,313	197,275
Loss from operations		(55,392)	(18,337)	(147,313)	(196,389)
Other (expense) income:
Interest income		5,184	1,251	15,536	2,021
Other (expense) income, net		(18,802)	2,342	(19,895)	2,262
Total other (expense) income		(13,618)	(21,767)	(4,359)	(79,247)
Loss before income tax expense		(69,010)	(40,104)	(151,672)	(275,636)
Income tax (expense) benefit		(18)	(3)	(50)	26
Net loss		$ (69,028)	$ (40,107)	$ (151,722)	$ (275,610)
Net loss per share, basic (in dollars per share)		$ (1.36)	$ (9.34)	$ (3.43)	$ (69.57)
Net loss per share, diluted (in dollars per share)		$ (1.36)	$ (9.34)	$ (3.43)	$ (69.57)
Weighted-average common shares outstanding, basic (in shares)		50,889,433	4,293,812	44,263,746	3,961,546
Weighted-average common shares outstanding, diluted (in shares)		50,889,433	4,293,812	44,263,746	3,961,546
Forward contract liability
Other (expense) income:
Change in fair value of forward contract liability		$ 0	$ (25,360)	$ 0	$ (83,530)
Development fee and royalty
Revenue:
Total revenue		$ 0	$ 0	$ 0	$ 886

[1] Includes $7.7 million and $34.2 million in related party expenses for the three and nine months ended September 30, 2024, respectively, and $19.4 million and $20.8 million related party expenses for the three and nine months ended September 30, 2023, respectively.